Put this on with 511 cams, a high flow air filter. Python Venom Radius exhaust, and an FP3 tuner. There's only about a 6% difference on the speedometer and actual traveling speed but it definitely wakes the bike up, pulls hard even in 6th for highway passing. I recommend the regear, 2 teeth make a big difference. By the way, it'll spin fairly easy when you hit it moderate hard on wet roads. This is how a big twin should perform.